Carton-sealing machine.



A.- L. SCHRAM.

CARTON SEALING MACHINE.

APPLICATION FILED OCT. 6, i914.

1 1 75, 1 8 1 Patented Mar. 14, 1916.

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A. L. SCHRAM. v

CARTON SEALING MACHINE. APPLlCATiON FILED OCT. 6, 1914.

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Patented Mar. 14, 1916 1 companying UNITED s'rnirns PATENT, canton.

ALEXANDER L. SCHRAM, or HILLSBORO, ILLINOIS, ass' enon T sonnnn enassMANUFACTURING ooMrAnY, or sr. LOUIS, MISSOURI, A CORPORATION orMISSOURI.

CARTON-SEALING MACHINE.

Specification of Letters Patent. l 'Pgtefitgd plan 14, 191$ Applicationfiled October 6,1914. Serial No. 865,297.

1 0 all whom it may concern Be it known that I. ALEXANDER L.

. SCHRAM, a citizen ofthe Jnited States, and

fication containin a'full, clear and exact description, reference beinghad to the acdrawings, forming a part hereof. r Y

My invention relates to improvements in' carton sealing machines, inwhich a laterally swinging pressure device operates in conjunction withinterchangeable bed plates; 7 and the ob ect of .my improvements are,first, tojprovide interchangeable bed plates,

whereby tne machine may be adapted to operate on cartons of differentdimensions; and, second, to provide a pressure'device which may be swungfrom a position covering the bed plates in order that a partially formedcarton may be slipped over the bed plate and whose swinging supportcauses the pressure device to bear on the carton with equal pressurethroughout. I attain these and other objects by the mechanismhereinafter described in detail, pointed out in my claims andillustrated by the accompanying drawings, in which:

Figure 1 shows in front elevation a machine embodying my invention, thepaste pot being removed and a portion of the spacing sleeves at the topof the machine being shown in section; Fig. 2 i a side elevation of themachine as shown in Fig. 1; Fig. 3 is a perspective on a reduced scaleof a carton in the condition required for the operation of the machine;and Fig. 4 is a detail sectional elevation showing the pivotal connection between the presser block and one of its suspending arms.

Referring by numerals to the accompanying drawings: 4 designates thebase of the machine, arising from which is the integral;

standard 5 which is preferably formed hollow throughout its height. Atdiametrically opposite points the standard is provided with integralbearings designated bv numerals 6 and paralleling at least one of saidbearings is an arm 7 having its outer end perforated to receive a stemsuch as 8 for the support of a paste pot 9. In order to provide foraltitudinal adjustment of the pot for the convenience of tall and shortoperators, the stem 8 may beadjusted relative to the arm 7 by means ofthe set screw 10, and the pot may be adjusted relative to the stem bythe set screw 11.

The numeral 12, designates the bed plate or work support, which isprovided with a dowel 13 arranged to fit within the open top of thestandard 5. In practice I contemplate the employment of a number ofdifferent sized bed plates, as the sizes of cartons operated upondictate.

The numeral 14 designates the pressure device or bresser block having'onits uppermost face the-'bearings15.

Carried by a flange at the top of the standard, is a plurality of setscrews 12, and formed onv the bottom face of the presser block, in likearrangement with the set screws, is anumber of seats to receive the endsof the set screws (as shown by dotted lines in'Fig. 2). By this means Ican raise or lower the bed plate to compensate for different thicknessesof material and also provide a means to prevent the bed plate fromrotating about the dowel 1.3.

Pivotally connected with each bearing 15 1s a suspending bar 16, whoseupper ends are pivotally connected with a rod 17 supported by thesustaining bars 18, the sustaining bars in turn being pivotally securedto the bearings 6 carried by the standard by means of the pivot pins 19.The sustaining bars '18 are each provided at their lowermost endswithangular extensions 20, which as.

clearly shown in Fig. 2, cooperate with the stops 22, formed atoppositemargins of the base at to limit the movement of the sustaining bars18when the presser block is moved from a position over the bed plate.

Each of the bearings'15 of the presser block carries adjacent itsrearmost end an upwardly projecting stop 23, whichis arranged to engagethe suspending arms at times to hold the presser block locked over deadcenter. duringthe time the adhesive is being dried, but which bearingsand stop permit limited free pivotal movements be tween the presserblock and its suspending By preference this flange 25 extends the entirewidth of the presser block and is formed at right angles to the bottomface thereof in order to engage a carton and true it over the bed plate.

In the practical operation of the machine the presser block is moved ina position from over the bed plate as shown by the dotted lines X inFig. 2, and a carton such as shown in Fig. 3 is slipped over the bedplate and standard. The flaps A and B of the carton are then foldedtoward each other and rested on the top of the bed plate. The operatorthen applies an adhesive obtained from the pot 9 to the uppermostsurfaces of the.

flaps A and B. The flaps O and D are then bent to partially overlie theflaps A and B and the operator then grasps the handle 24 and draws thepresser blockto the position shown by dotted lines Y in Fig. 2, wherethe presser block first engages the partially folded flaps C and D andgradually moves them toward the gummed flaps A and B.

As the presser block is moved to its forward limit .of movement shown bythe dotted lines Z (Fig. 2) over the flaps of the carton and the bedplate, it gradually but not fully approaches parallelism therewith. Dueto the construction of the bearings 15, as shown in detail by F ig.- 4,it will be possible to move the presser block beyond center over the bedplate to permit the flange 25 to true the carton over the bed plate.After this truing the presser block is moved rear wardly until it isdisposed centrally over the bed plate (as shown by the full lines inFig. 52), in which. position the suspending arms 16 exert the requiredpressure to cause the flaps C and D to adhere to the gummed flaps A andB. In this position the presser block is permitted to stand a sufficienttime to assure suflicient drying of the adhesive to secure the flaps. Inthis position the suspend ing arms are in alinement with the sustainingarms, and hence the presser block is practically locked at a positionwhere the suspending arms exert a maximum pressure on the flaps of thecarton.

Having thus described my invention, what I claim as new therein anddesire to secure by Letters Patent of the United States therefor, is:

1. In a carton sealing machine, a. removable bed plate, a pair ofsustaining arms, a rigid element suspended. from the sustainmg arms, apresserblock pivotally carried ried by said arms, a presser blockpivotally carried by the suspending element, means for limiting thepivotal movement of the presser block relative to the suspendingelement,and means carried by the presser block for engagement with the bed plateto limit the movement of the presser block relative to the bed plate.

A carton sealing machine con'iprising in combination a bed. plate, anarm having F its pivotal. point beneath the bed. plate, a

second arm pivotally suspended from the first mentioned arm otallysuspended from said second 7 arm, means for limiting the movement of thefirst mentioned arm relative to the bed plate, and means for limitingthe movement of the presser block relative ,to the second mentioned arm.

4. In a carton sealing machine, a bed plate, a supporting means movableover the bed plate, a rigid 'arm suspended from said. supporting means,a presser block pivotally suspended from said arm, means for limitingthe movement of the supporting means and means for limiting the movementof the presser block relative tothe bed plate.

In testimony whereof, I have signed my Copies of this patent may beobtained for five cents each, by addressing the Commissioner of Patents;

Washington, D. C.

and a presser block piv-

